JPH02160362A - Fluorescent lamp for display - Google Patents

Abstract

PURPOSE:To provide possibility of dimming for each color and construct the device in small size by connecting mating electrodes for different colors with a common power supply through respective dimming means, and thereby eliminating necessity for providing individual power supplies for different colors. CONSTITUTION:A fluorescent lamp for display is equipped with a plurality of light emitting chambers 6 for respective colors, which are furnished with fluorescent films assuming display colors of red, green, and blue and with mating electrodes 13, 14, 15 for respective colors, and with a common electrode 12 to perform discharge with these mating electrodes 13-15 for respective colors, which are connected with a common power supply and the mentioned common electrode 12 through respective dimming means 22, 23, 24. This decreases the number of electrodes, and when constituting a lightup circuit, reduces the number of terminals connected to the lamp, simplifies the circuit configuration, and enables individual dimming for different colors through control by the dimming means 22-24 for respective colors. This eliminates provision of individual power supplies for different colors, allows obtainment of desired color, provides adjustability for light quantity, and permits constructing the device in small size.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a fluorescent lamp device for display, and is used, for example, as a guide display device, an electric light display device, or a display element such as a display. The present invention relates to a lighting control device for a single-tube multicolor light lamp suitable for various applications.

(Prior Art) As a display element used in conventional outdoor guidance signs, electronic display devices, displays, etc. that display characters and images,
For example, Jikkoame No. 39-22214 and Jikkosho 3
As described in Publication No. 9-22215, the display surface of one tube is divided into three parts, and three colors of light, red, green, and blue, are emitted using the display surface of the same tube. Light emitting tubes made from this type of light are known. This conventional arc tube is a CRT in which a target having red, green, and blue luminescent material layers is provided in an integrated outer tube, and the target emits light using an electron beam.

Furthermore, as described in Japanese Patent Application Laid-Open No. 57-124832, a fluorescent film exhibiting display colors of red, green, and blue is formed on the front surface of one tube, which becomes the display surface. A display element is known that has a structure in which counter electrodes for each color are formed on the inner circumferential surface, and a common electrode of an aluminum strip plate that performs discharge is formed radially from the center of the counter electrodes for each color.

(Problems to be Solved by the Invention) In the conventional display elements described in the above-mentioned conventional Japanese Utility Model Publication No. 39-22214 and Japanese Utility Model Publication No. 39-22215, the target is irradiated from the viewpoint of thermal deterioration of the luminescent material. There is a limit to the intensity of the electron beam that can be produced, and for this reason, the brightness is 50% lower than that of a fluorescent discharge lamp using a rare earth fluorescent film.
Furthermore, since a high voltage is required to accelerate the electron beam, the socket becomes larger and more complex. There is a problem in that the effective light emitting area of the display device cannot be increased because the bodies cannot be placed in close contact with each other.

Furthermore, the display element described in JP-A-57-124832 uses electrodes made of aluminum band plates formed in a radial pattern, so the electrodes are large, the electrode chamber becomes large, and the entire lamp becomes large. are doing.

The present invention was made in view of the above problems, and it is possible to improve the mounting density in a display device by integrating three color fluorescent lamps and reduce the number of lamp sockets, and also to reduce the number of electrodes. In order to facilitate the display, a display fluorescent lamp is used, which has a plurality of light emitting chambers with counter electrodes for each color in the tube, and a common electrode for discharging the counter electrodes for each color. The present invention provides a fluorescent lamp device for display that can obtain colored light and light amount of .

[Structure of the invention]

(Means for Solving the Problems) The display fluorescent lamp device of the present invention includes a tube whose inside is filled with mercury and an inert gas and whose front part is a display surface, and a tube that crosses the display surface inside the tube. a plurality of light-emitting chambers for each color, which are separated from each other by partition walls extending in a direction in which the light-emitting chambers are separated from each other, each provided with a fluorescent film exhibiting display colors of red, green, and blue, and each having a counter electrode for each color; It is characterized by comprising a counter electrode for each color and a common electrode for discharging, which are provided in the tube body, and the counter electrode for each color is connected to a common power source and common electrode through separate dimming means. That is.

(Function) In the display fluorescent lamp device of the present invention, when electric power is selectively supplied between the common electrode and the common electrode, discharge occurs between the common electrode and the counter electrode, and the display surface is illuminated by the fluorescent film. It emits red, green and blue colored light corresponding to the light film. In addition, one lamp can have multiple opposing electrodes corresponding to the common electrode, reducing the number of electrodes, and when configuring a lighting circuit, the number of terminals connected to the lamp can be reduced and the circuit configuration can be simplified. becomes. Since the opposing electrodes for each color are each connected to a common power source via a dimming means, there is no need to provide a power source for each color, and by controlling the dimmer, each color can be individually dimmed. As the color light can be obtained and the amount of light can be adjusted, the device can be made smaller.

(Example) The configuration of an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a fluorescent lamp, which has a cylindrical first outer tube portion made of transparent glass and has a stem portion 3 with one end surface open and the other end surface closed, e.g. A lower outer tube part 4, and a second outer tube part, for example, an upper outer tube, formed of glass and having a flat U-shaped cross section and forming a display surface 7 by sealing the open end surface of the lower outer tube part 4. The portion 5 forms one airtight cylindrical tube body 2. And inside this tube body 2, 0.005 to 0.006 mmH
It is filled with an inert gas such as g of mercury and argon gas at a pressure of several uunHg.

Furthermore, red, green, and blue fluorescent films 6R, 6G, and 6B are provided on the inner surface of the upper outer tube portion 5 of the tube body 2.
are formed in equal areas every 120 degrees radially from the center. The fluorescent films 6R, 6G, and 6B are preferably made of high-luminance rare earth phosphors, and the fluorescent film 6R exhibiting red color is
For example, (Y, Eu) 203 , the green fluorescent film 6R is made of (Y, Cc, Tb) 2Si
n2. Moreover, the fluorescent film 6B exhibiting blue color is, for example, (
S r+ CI+ El+) + o (Po4) b
Use CJ2.

Further, in the center of the lower outer tube section 4, there is a central partition wall section 8 extending in a direction intersecting the display surface 7 in a circular shape with the outer peripheral surface of the lower outer tube section 4! is formed, and a circular electrode chamber 8 is formed inside this central partition wall portion 81 . Further, side partitions 8b are provided which extend radially from the outer circumferential surface of the central partition part 81 to the inner circumferential surface of the outer wall of the lower outer tube part 4 at an angle of 120 degrees to each other in a direction intersecting the display surface 7. Three fan-shaped light emitting chambers 6 are formed by the side partitions 8b, corresponding to the respective fluorescent films 6R, 6G, and 6B.

The central partition wall 8a forming the electrode chamber 8 is formed to be slightly lower in height than the side partition wall 8b forming each of the light emitting chambers 6, and the upper edge of the side partition wall 8b is connected to the lower outer tube section. The light emitting chamber 6 and the electrode A discharge communication portion 9 communicating with the chamber 8 is formed, and this discharge communication portion 9
is arranged facing the center of the display surface 7.

Further, in the electrode chamber 8, a triangular common filament electrode 12 is provided which is connected to two wells 10 and supported by two insulating poles 11. Further, in the light emitting chamber 6, counter electrodes 13 and 14 made of filaments are connected and supported by two wells 10 disposed in a straight line opposite each side of the common filament electrode 12.
．． 15 are provided. The thick portion of the stem portion 3 is inserted into each of these wells 1O in an airtight manner and led out.

Next, the electrical connection of the display fluorescent lamp 1 will be explained based on FIG. 5.

The common filament electrode 12 is connected to one pole of the AC power supply 21, and each counter electrode +3.14.15 is connected to the other pole of the AC power supply 21 via separate dimming means, e.g. dimmers 22.23.24. It is connected to the. Each of these dimmers 22, 23, 24 changes the ballast circuit based on the dimming signal input to the terminals a, b, c, and connects the common filament electrode 12 and each opposing electrode 13, 14, 15. Control the power supplied. In this way, the counter electrode 1 for each color
3, 14, and 15 are each connected to a common power source 21 and a common electrode 12 via separate dimming means.

Note that the common filament electrode 12 and each counter electrode 13, 14, 15 are connected to a filament transformer 25, respectively.
．． 26 for preheating.

Next, a method for manufacturing the fluorescent lamp of this embodiment will be explained.

A lower outer tube section 4 having a stem section 3 and a partition wall 8a.

8b is integrally molded with transparent glass, and this stem portion 3
Two wells 1G are inserted and fixed at positions corresponding to each light emitting chamber 6 and electrode chamber 8 partitioned by partition walls 8g and 8b, respectively, and partition walls 8! Two insulating poles 11 are also fixed to the electrode chamber 8 partitioned by.

Two wells 1 provided in each of the light emitting chambers 6
Opposite electrodes 13° 14, 15 of the filament between the tips of G
At the same time, both ends of a common filament electrode 12 formed in a triangular shape and supported by an insulating pole 11 between the tips of two wells 10 provided on the partition wall 8a are connected.

In addition, the upper outer tube part 5 is molded from transparent glass, and the display surface 7 is made of transparent glass.
Red, green, and blue phosphors divided radially into three equal parts are coated on the inner surface of the tube to provide fluorescent films 6R, 6G, and 6B.

Next, the upper outer tube section 5 is hermetically welded to the opening edge of the lower outer tube section 4.

Furthermore, after exhausting the air inside the tube body 2 from an exhaust pipe (not shown) provided in the lower outer tube portion 4, mercury and argon gas are filled in to close the exhaust pipe.

Next, the operation of this embodiment will be explained.

Common filament electrode 12 and counter electrode 13.14°15
When power is selectively supplied between the common filament electrode 12 and the counter electrode +3.14.
15, and the display surface 7 becomes the fluorescent film 6R.
, 6G, and 6B, selectively emit light in red, green, and blue. And counter electrodes 13, 14.15 for each color
AC power supply 2 via dimmer 22, 23, 24 respectively
1, so each dimmer 22, 23, 24 is connected to terminal a
When controlled by changing the dimming signals output from , b, and c, it is possible to individually dim each color, obtain the desired color light, and adjust the amount of light. By adjusting this dimming signal, The color of the display fluorescent lamp 1 corresponding to one picture element can be changed.

Further, in the structure of this embodiment, the fluorescent films 6R and 6G.

By using a fluorescent discharge method in which 6B is formed and using a rare earth phosphor, for example, the brightness can be improved to about twice that of a conventional single-tube three-color CRT method.

A discharge communication section 9 is provided at the center of the display surface 7 to communicate each light emitting chamber 6 for each color, each provided with a counter electrode 13, 14, 15 for each color, and an electrode chamber 8 provided with a common filament electrode 12. Since the discharge communication portions 9 are arranged so as to face each other, each discharge communication portion 9 can be easily balanced and a point light source can be obtained.

Furthermore, since the tube body 2 is formed of a lower outer tube section 4 and an upper outer tube section 5 which are separate bodies, by making the lower outer tube section 4 on which the partition walls 8a and 8b are formed non-transparent, each No light that passes through the partition wall 8b enters the light emitting chamber 6, and the generation of stray light can be prevented.

Furthermore, since the fluorescent lamp 1 is a single tube, it is possible to increase the packing density in the display device compared to a configuration using three display elements on the same area of the display surface. The area can be increased, and the average brightness of the display device can be increased.

Furthermore, in this embodiment, since the common filament electrode 12 and the counter electrode +3, 14, 15 are provided on the stem portion 3 formed on the other end surface of the tube body 2, the cap can be integrally formed and provided on the display device side. The socket can also be formed integrally, allowing the fluorescent lamp 1 and the socket to be miniaturized.

Furthermore, three pairs of electrodes are connected to three opposing electrodes 13. 14°1
5 and one common filament electrode 12, the number of electrodes normally required can be reduced to four.
There is no need for 12 wells 1θ, but only 8, and 8 pins are sufficient for the base, simplifying the structure of the base and socket, facilitating manufacturing and assembly work, and reducing manufacturing costs.

Further, the electrode chamber 8 and each light emitting chamber 6 are connected to each other by a discharge communication section 9.
The discharge path is formed in the shape of a letter, and even if the total length of the tube body 2 is short, the discharge path length required for the required brightness can be obtained.

Further, since the height of the partition walls 8a, 8b of the lower outer tube section 4 is formed lower than the opening edge of the lower outer tube section 4, breakage of the partition walls 8a, 8b during the manufacturing process is prevented.

Next, the specific dimensions of this fluorescent lamp 1 will be explained.

The diameter R of the pipe body 2 is 45 mm, the height of the pipe body 2 is 45 mm,
The height h2 of the partition wall 8b that partitions each light emitting chamber 6 is 40 mm, and the height of the partition wall 8a forming the electrode chamber 8 is 35 mm.

In the above embodiment, the tube body 2 was formed into a substantially cylindrical shape, but it was formed into a rectangular tube shape, and the three-color fluorescent films 6R, 6G, and 6B were formed radially on the display surface as in the above embodiment. In addition, the lower outer tube portion 4 may be divided into the light emitting chamber 6 and the electrode chamber 8 at the center and its periphery by partition walls 8a and 8b.

Further, the upper outer tube portion 5 is not limited to a planar shape, but may also be curved.

Alternatively, the tube body 2 may have a rectangular tube shape, or the upper outer tube portion 5
In the case of a curved configuration, etc., the height of the partition wall 8 with respect to the lower outer tube portion 4 is adjusted to form a gap sufficient to always form the discharge communication portion 9 between the display surface 7 and the partition walls 8M and 8b. There is a need.

Further, on the outer surface of the upper outer tube portion 5, colored coatings of red, green, and blue can be formed to correspond to the red, green, and blue display surfaces 7.

Furthermore, although the lower outer tube portion 4 has a structure in which the stem portion 3 and the partition wall 8 are integrally formed, the lower outer tube portion 4 and the partition wall 8! , 8b
It is also possible to separately form the stem portion 3 provided with the stem portion 3 and then weld the stem portion 3 and the lower outer tube portion 4 together. In this configuration, the tube body 2 and the partition wall 8a.

A slight gap is formed between both ends of 8b in order to insert the partition walls 8a and 8b, but this gap is blocked in terms of discharge, and the discharge path is not short-circuited during discharge. There is no.

〔Effect of the invention〕

According to the present invention, there are provided a plurality of light-emitting chambers for each color each provided with a fluorescent film exhibiting display colors of red, green, and blue and provided with a counter electrode for each color, and a counter electrode for each color and a discharge chamber. The counter electrodes for each color are connected to a common power source and a common electrode through dimming means, so the number of electrodes can be reduced, and when configuring a lighting circuit,
The number of terminals connected to the lamp can be reduced, the circuit configuration can be simplified, and by controlling the dimming means for each color, each color can be individually dimmed, and there is no need to provide a power supply for each color. Not only can colored light be obtained, but the amount of light can be adjusted, and the device can be made more compact.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional plan view of a display fluorescent lamp used in a display fluorescent lamp device showing one embodiment of the present invention, FIG. 2 is an electric circuit diagram of the display fluorescent lamp device, and FIG. 3 is an electric circuit diagram of the display fluorescent lamp device. Figure 4 is a vertical sectional front view taken along line nn in Figure 1, and IV-I in Figure 1.
A vertical sectional view of the V portion, and FIG. 5 is a plan view of the same. 1
・・Fluorescent lamp, 6R, 6G, 6B
... Fluorescent film, 6.. Light emitting chamber, 7.. Display surface, 8.. Electrode chamber, 8! , 8b...Partition wall, 9...Discharge communication part, 12
・・Common electrode, +3.14.15・・Counter electrode, 22.
23.24...Dimmer.

Claims (1)

[Claims] (1) A tube body filled with mercury and inert gas and with its front surface as a display surface, separated from each other by a partition wall extending in a direction intersecting the display surface within this tube body;
A plurality of light-emitting chambers for each color each having a fluorescent film exhibiting green and blue display colors and a counter electrode for each color, and a counter electrode for each color provided within the tubular body to perform discharge. a common filament electrode, wherein the opposing electrodes for each color are connected to a common power source and a common electrode through separate dimming means.